47e4282c19
Introduces a macro abstraction around capturing the bounds of a function, which many platforms handle subtly differently (Mach-O, and ELF, for example). Also introduce an arm64[^-]* -> aarch64 available feature, to enable more tests that would otherwise be excluded on Apple platforms, whose target triples tend to take the form e.g. 'arm64-apple-macosx', rather than 'aarch64-apple-macosx'. Third, we implement the has-sme check using the appropriate sysctl, as getauxval is not available on Darwin platforms.
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// REQUIRES: target={{aarch64-.+}}
|
|
// UNSUPPORTED: target={{.*-windows.*}}
|
|
|
|
// TODO: investigate this failure.
|
|
// XFAIL: target={{.*-apple-.*}} && stdlib=system
|
|
|
|
// Basic test for float registers number are accepted.
|
|
|
|
#include "support/func_bounds.h"
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unwind.h>
|
|
|
|
FUNC_BOUNDS_DECL(main_func);
|
|
|
|
_Unwind_Reason_Code frame_handler(struct _Unwind_Context *ctx, void *arg) {
|
|
(void)arg;
|
|
|
|
// Unwind until the main is reached, above frames depend on the platform and
|
|
// architecture.
|
|
uintptr_t ip = _Unwind_GetIP(ctx);
|
|
if (ip >= (uintptr_t)FUNC_START(main_func) &&
|
|
ip < (uintptr_t)FUNC_END(main_func)) {
|
|
_Exit(0);
|
|
}
|
|
|
|
return _URC_NO_REASON;
|
|
}
|
|
|
|
__attribute__((noinline)) void foo() {
|
|
// Provide some CFI directives that instructs the unwinder where given
|
|
// float register is.
|
|
#if defined(__aarch64__)
|
|
// DWARF register number for V0-V31 registers are 64-95.
|
|
// Previous value of V0 is saved at offset 0 from CFA.
|
|
asm volatile(".cfi_offset 64, 0");
|
|
// From now on the previous value of register can't be restored anymore.
|
|
asm volatile(".cfi_undefined 65");
|
|
asm volatile(".cfi_undefined 95");
|
|
// Previous value of V2 is in V30.
|
|
asm volatile(".cfi_register 66, 94");
|
|
#endif
|
|
_Unwind_Backtrace(frame_handler, NULL);
|
|
}
|
|
|
|
FUNC_ATTR(main_func) int main(int, char **) {
|
|
foo();
|
|
return -2;
|
|
}
|